JPH0752114Y2 - Paper feeder - Google Patents
Paper feederInfo
- Publication number
- JPH0752114Y2 JPH0752114Y2 JP1989150745U JP15074589U JPH0752114Y2 JP H0752114 Y2 JPH0752114 Y2 JP H0752114Y2 JP 1989150745 U JP1989150745 U JP 1989150745U JP 15074589 U JP15074589 U JP 15074589U JP H0752114 Y2 JPH0752114 Y2 JP H0752114Y2
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- shaft member
- side plate
- roller
- paper feed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Description
【考案の詳細な説明】 産業上の利用分野 本考案は、静電複写機、プリンタ、ファクシミリ等で原
稿用紙、複写用紙等を１枚づつ給紙するための給紙ロー
ラの軸支構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft support structure of a paper feed roller for feeding original sheets, copy sheets, etc. one by one in an electrostatic copying machine, a printer, a facsimile and the like.
従来の技術 給紙ローラは、ローラと用紙との間の摩擦によって用紙
を１枚づつ取り出すものであるため、その摩擦係数がき
わめて重要な要素となっている。給紙ローラの用紙と接
する部分は通常ゴムで形成されているが、ゴムの特性と
して、長時間使用するにつれて自然劣化し、また、用紙
の粉等が付着することにより、摩擦係数が変化する。こ
のため、給紙ローラは、多くの場合、定期交換部品とな
っている。2. Description of the Related Art Since a paper feed roller takes out paper one by one by friction between the roller and paper, its friction coefficient is an extremely important factor. The portion of the paper feed roller that is in contact with the paper is usually formed of rubber, but due to the characteristics of the rubber, it naturally deteriorates with long-term use and the friction coefficient changes due to the adhesion of paper powder and the like. For this reason, the paper feed roller is often a regular replacement part.
給紙ローラはローラ軸に担持され、そのローラ軸は片端
又は両端が側板に支えられて一方から回転駆動される、
というのが一般的な構造である。しかし、片端のみで支
えられる構造（いわゆる片持ち）では、高速回転時に振
れが生じるため、高速給紙が行えないという欠点があ
る。両端を側板に支える方法は、比較的高速回転の使用
に耐えるという利点はあるが、給紙ローラの交換が面倒
であるという欠点がある。The paper feed roller is carried by a roller shaft, and one end or both ends of the roller shaft is supported by side plates and driven to rotate from one side.
That is the general structure. However, in a structure that is supported by only one end (so-called cantilever), there is a drawback that high-speed sheet feeding cannot be performed because shake occurs at high speed rotation. The method of supporting both ends on the side plates has an advantage that it can withstand the use of relatively high-speed rotation, but has a drawback that it is troublesome to replace the sheet feeding roller.
このため、両端支持型でありながら給紙ローラの交換が
容易な軸支構造が、従来、いくつか提案されている。例
えば、ローラ軸を分割してネジ等で固定しておき、給紙
ローラ交換時には、そのネジ等を外した後、一方の側板
の外側から分割軸の一方を引き抜いてスペースをつく
り、そのスペースから給紙ローラの取り外し・取り付け
を行うという構造がある。しかし、これは、複写機の外
枠等の制約により側板の外側に軸を引き抜くだけのスペ
ースが取れない場合には、採用できない。For this reason, there have been conventionally proposed some shaft supporting structures which are of both-ends supporting type and in which the paper feeding rollers can be easily replaced. For example, split the roller shaft and fix it with screws, etc.When replacing the paper feed roller, remove the screws, and then pull out one of the split shafts from the outside of one side plate to create a space. There is a structure to remove and attach the paper feed roller. However, this cannot be adopted when there is not enough space for pulling out the shaft outside the side plate due to restrictions such as the outer frame of the copying machine.
両側板の内側だけで給紙ローラを交換できる構造とし
て、実開昭63-90646号公報には、ローラ軸を給紙ローラ
の両側で分断し、その分断部分を重ね合わせ構造にして
ネジ止めするという方法が示されている。また、実開昭
64-56433号公報には、バネにより軸方向に押圧される凸
部を用いた凹凸軸連結構造が示されている。As a structure in which the paper feed roller can be replaced only inside the both side plates, in Japanese Utility Model Laid-Open No. 63-90646, the roller shaft is divided on both sides of the paper feed roller, and the divided portions are superposed and screwed. Is shown. Also,
Japanese Unexamined Patent Publication No. 64-56433 discloses a concavo-convex shaft connecting structure using a convex portion axially pressed by a spring.
考案が解決しようとする課題 前者の公報の方法では、ローラ軸の加工が比較的難し
く、中心が出しにくいという問題がある。中心が正しく
出せない場合、高速回転時の振れの問題が生ずる。ま
た、後者の方法では、両軸間の結合は凹部と凸部とのバ
ネによる押圧のみであるため、全体として軸の固定が堅
固とは言えず、こちらでも高速回転時に振れるという問
題がある。すなわち、従来、給紙速度の高速化と給紙ロ
ーラ交換の容易性とは相反する問題となっていた。Problems to be Solved by the Invention In the method of the former publication, there is a problem that machining of the roller shaft is relatively difficult and the center is difficult to be set. If the center cannot be set correctly, the problem of runout at high speed rotation occurs. Further, in the latter method, since the coupling between both shafts is only the pressing of the concave portion and the convex portion by the spring, it cannot be said that the shaft is fixed as a whole as a whole, and there is a problem that the shaft swings at high speed. That is, conventionally, there has been a contradictory problem between the increase of the sheet feeding speed and the ease of exchanging the sheet feeding roller.
本考案はこのような問題を解決し、給紙ローラの取り付
け・取り外しが限られたスペース内で容易に行え、か
つ、高速回転時にも振れることのない給紙装置を提供す
ることを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to solve such a problem, and to provide a sheet feeding device in which a sheet feeding roller can be easily attached / removed in a limited space and which does not shake even at high speed rotation. .
課題を解決するための手段 上記の目的を達成するため、本考案に係る給紙装置で
は、一端が右側板に回転可能に支持され、他端が左右側
板の間で自由端となっている第１軸部材と、 第１軸部材の外周に嵌装された筒状部材及び該筒状部材
に装着されたローラから成るローラユニットと、 第１軸部材と同軸上に設けられ、一端が第１軸部材の上
記他端から所定の間隔を隔てて自由端となっており、他
端が左側板に回転可能に支持されており、かつ、右側板
側へ上記所定間隔だけ引き抜くことにより左側板から取
り外し可能な第２軸部材と、 使用時には第１軸部材の自由端と第２軸部材の自由端と
の間に橋渡しされ、各軸部材毎に設けられた取り外し可
能な固定部材により両軸部材を連結するとともに、ロー
ラ交換時には第２軸部材の方へスライドすることにより
両軸部材を切り放すスリーブと、 を備え、第２軸部材を第１軸部材から切り放して左側板
から取り外すことによって生じるスペースを利用して前
記ローラユニットを第１軸部材から取り外せるようにし
たことを特徴とする。Means for Solving the Problems In order to achieve the above object, in the paper feeding device according to the present invention, one end is rotatably supported by the right side plate and the other end is a free end between the left and right side plates. A roller unit including a shaft member, a tubular member fitted around the outer periphery of the first shaft member, and a roller mounted on the tubular member; and a roller unit that is provided coaxially with the first shaft member and has one end of the first shaft. It is a free end with a predetermined distance from the other end of the member, the other end is rotatably supported by the left side plate, and is removed from the left side plate by pulling out toward the right side plate by the above predetermined distance. A possible second shaft member and, when in use, a bridge between the free end of the first shaft member and the free end of the second shaft member, and a removable fixing member provided for each shaft member to secure both shaft members. When connecting the rollers, slide them toward the second shaft member when replacing the rollers. And a sleeve that cuts off both shaft members by idling, and the roller unit can be removed from the first shaft member by utilizing a space generated by cutting off the second shaft member from the first shaft member and removing it from the left side plate. It is characterized by doing so.
なお、ここにおける左右は任意であり、もちろん逆であ
ってもかまわない。また、ここで言う「給紙装置」は、
単に複写機、プリンタ等で用いられる白紙の複写用紙、
印刷用紙の給紙のための装置に限られず、原稿用紙の搬
送装置等も含まれる。Note that the left and right sides here are arbitrary and, of course, may be reversed. Also, the "paper feeder" here is
A blank copy sheet that is simply used in copiers, printers, etc.
The present invention is not limited to the device for feeding the printing paper, but includes a document paper feeding device and the like.
作用 使用時には、第１軸部材の一端からの回転駆動力が第１
軸部材、ローラ及び第２軸部材を回転させるが、このと
き、第１軸部材と第２軸部材とはスリーブと固定部材に
より堅固に固定され、また、ローラは回転方向に関して
第１軸部材に固定されているため、各部材間に遊びがな
く、高速回転時に振れることがない。In operation, the rotational driving force from one end of the first shaft member is the first
The shaft member, the roller and the second shaft member are rotated. At this time, the first shaft member and the second shaft member are firmly fixed by the sleeve and the fixing member, and the roller is fixed to the first shaft member in the rotational direction. Since they are fixed, there is no play between each member, and there is no swing during high speed rotation.
ローラ交換時には、スリーブと各軸部材とを固定してい
る固定部材を外し、スリーブを第２軸部材側にスライド
させて、スリーブを第１軸部材から外す。その後、第２
軸部材を上記所定距離（両軸部材間の距離）だけ右側板
側に引き抜くことにより、左側板から取り外す。そし
て、ローラユニットを第１軸部材に沿って左側にスライ
ドさせ、第１軸部材から外す。新しいローラユニットの
取付は、上記の逆の手順で行う。When replacing the rollers, the fixing member that fixes the sleeve and each shaft member is removed, the sleeve is slid toward the second shaft member side, and the sleeve is removed from the first shaft member. Then the second
The shaft member is removed from the left side plate by pulling out the shaft member to the right side plate side by the predetermined distance (distance between both shaft members). Then, the roller unit is slid to the left along the first shaft member and removed from the first shaft member. To install a new roller unit, reverse the above procedure.
なお、ここで用いた「左右」という語は単に説明の便宜
上のものであり、当然逆でもかまわない。Note that the term "right and left" used here is merely for convenience of description, and may be reversed.
実施例 以下、本考案の実施例を図面を参照しつつ説明する。第
２図及び第３図は複写機のカセットタイプの給紙部を示
す。第２図において、カセットケース10の装填部12に載
置された複写用紙の束14は、バネ16により上方の給紙ロ
ーラ18に押しつけられる。この状態で給紙ローラ18が回
転することにより、一番上の用紙15のみが、給紙ローラ
18と用紙15との間の摩擦力により、用紙間の摩擦力に抗
して左方に引き出され、複写機内に供給される。Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 2 and 3 show a cassette type sheet feeding portion of a copying machine. In FIG. 2, a bundle 14 of copy sheets placed on the loading section 12 of the cassette case 10 is pressed against the upper sheet feed roller 18 by a spring 16. By rotating the paper feed roller 18 in this state, only the top paper 15 is
The frictional force between the paper 18 and the paper 15 pulls it out to the left against the frictional force between the papers and supplies it into the copying machine.
給紙ローラ18は、プラスチックケースに２個のゴムロー
ラ18a,18bを所定間隔を隔てて固定したユニットタイプ
であり、第３図に示す通り、左右の側板20,21により回
転可能に保持されたローラ軸22のほぼ中央に取り付けら
れている。ローラ軸22は、給紙ローラユニット18の左端
よりも少し左の部分で２本に分割されており、左側の従
動軸23と右側の駆動軸24とから成る。駆動軸24の右端26
は右側板21を貫通して外側に延び、外部の駆動機構によ
り回転駆動される。駆動軸24と右側板21との間には軸受
29が設けられている。従動軸23は軸受28を介して左側板
20に支持されているが、左側板20から外側（左側）への
突出はほとんどなく、従動軸23は、右側へ少し移動させ
ることにより左側板20から引き抜くことができる。従動
軸23及び駆動軸24の軸受28,29は、ストップリング30,31
により各軸と各側板の間に固定されている。The paper feed roller 18 is a unit type in which two rubber rollers 18a and 18b are fixed to a plastic case at a predetermined interval, and as shown in FIG. 3, a roller shaft rotatably held by the left and right side plates 20 and 21. It is attached to the center of 22. The roller shaft 22 is divided into two parts at a portion slightly left of the left end of the paper feed roller unit 18, and includes a left driven shaft 23 and a right driving shaft 24. Right end 26 of drive shaft 24
Extends through the right side plate 21 and is rotatably driven by an external drive mechanism. A bearing is provided between the drive shaft 24 and the right side plate 21.
29 are provided. The driven shaft 23 is a left side plate via a bearing 28.
Although it is supported by 20, there is almost no protrusion from the left side plate 20 to the outside (left side), and the driven shaft 23 can be pulled out from the left side plate 20 by slightly moving it to the right side. The bearings 28 and 29 of the driven shaft 23 and the drive shaft 24 are the stop rings 30 and 31.
It is fixed between each shaft and each side plate.
給紙ローラユニット18及び両軸23,24の連結部の断面を
第１図に示す。駆動軸23と従動軸24との間には、従動軸
24の左端の軸受29の（軸方向）長さより僅かに長い分の
スペース32が設けられ、そのスペース32を挟んで両軸に
またがってスリーブ34がかぶせられている。給紙ローラ
ユニット18は駆動軸24上で軸方向に摺動可能であるが、
駆動軸24に植設されたピン35により、それより右側への
移動を阻止され、また、そのピン35により周方向にも固
定されている。給紙ローラユニット18がピン35に当接
し、スリーブ34が給紙ローラユニット18に当接した状態
で、スリーブ34がネジ36,37により各軸23,24に固定され
る。FIG. 1 shows a cross section of the connecting portion between the paper feed roller unit 18 and both shafts 23, 24. Between the drive shaft 23 and the driven shaft 24, the driven shaft
A space 32, which is slightly longer than the length (in the axial direction) of the bearing 29 at the left end of 24, is provided, and a sleeve 34 is put over both shafts so as to sandwich the space 32. The paper feed roller unit 18 is slidable in the axial direction on the drive shaft 24,
The pin 35 embedded in the drive shaft 24 prevents the pin 35 from moving to the right, and is also fixed in the circumferential direction by the pin 35. With the paper feed roller unit 18 in contact with the pin 35 and the sleeve 34 in contact with the paper feed roller unit 18, the sleeve 34 is fixed to the shafts 23, 24 by screws 36, 37.
通常の使用状態ではこのように駆動軸24と従動軸23とが
堅固に固定されているため、第２図の右側の端部26から
駆動されたローラ軸22は、給紙ローラ18（18a,18b）を
確実に回転させるとともに、高速回転時にも振れを生じ
ることがない。Since the drive shaft 24 and the driven shaft 23 are firmly fixed to each other in the normal use state, the roller shaft 22 driven from the end 26 on the right side of FIG. 18b) is surely rotated and does not shake even at high speed.
次に、給紙ローラユニット18を交換する際の手順を第４
図により説明する。まず、２本のネジ36,37を外し
（ａ）、スリーブ34を従動軸23側にスライドさせる
（ｂ）。次に、従動軸23を駆動軸24側に動かすことによ
り、従動軸23（及びその軸受28）を左側板20から引き抜
き、取り外す（ｃ）。そして、給紙ローラユニット18を
左側にスライドさせて駆動軸24から取り外す。Next, the procedure for replacing the paper feed roller unit 18
It will be described with reference to the drawings. First, the two screws 36 and 37 are removed (a), and the sleeve 34 is slid to the driven shaft 23 side (b). Next, by moving the driven shaft 23 toward the drive shaft 24, the driven shaft 23 (and its bearing 28) is pulled out from the left side plate 20 and removed (c). Then, the paper feed roller unit 18 is slid to the left and removed from the drive shaft 24.
新しい給紙ローラユニット18の取付は上記順序の逆に行
えばよいが、このとき、給紙ローラユニット18を駆動軸
24に装着する際にはピン35がストッパの役割を果たすた
め、給紙ローラユニット18の軸方向の位置決めは容易で
ある。また、スリーブ34を従動軸23と駆動軸24とにまた
がってかぶせる場合には、スリーブ34を給紙ローラユニ
ット18の左端に当接させればよく、その位置でスリーブ
34のネジ穴と各軸のネジ穴の位置が一致するようになっ
ているため、取り付けを容易に行うことができる。The new paper feed roller unit 18 may be attached in the reverse order of the above procedure.
Since the pin 35 plays a role of a stopper when the sheet feeding roller unit 18 is mounted on the sheet 24, it is easy to position the sheet feeding roller unit 18 in the axial direction. When the sleeve 34 is placed over the driven shaft 23 and the drive shaft 24, the sleeve 34 may be brought into contact with the left end of the paper feed roller unit 18, and the sleeve at that position.
Since the positions of the screw holes of 34 and the screw holes of each axis match, the installation can be done easily.
以上のように、本考案に係る給紙装置では、取り付け及
び取り外しの作業が容易であると同時に、一旦取り付け
られた後は、各部品が相互に固定されているため、高速
で回転しても軸が振れることがない。As described above, in the paper feeding device according to the present invention, the work of mounting and removing is easy, and at the same time, once the components are attached, the parts are fixed to each other, so that they can be rotated at a high speed. The shaft does not shake.
考案の効果 以上説明した通り、本考案によれば、ローラの交換のた
めの作業がきわめて容易となり、短時間に行えるように
なる。また、この際、ローラ軸を外側に抜き出すという
ことがないため、周囲にスペースを必要とせず、小型複
写機等でも本給紙装置を採用することができる。さら
に、一旦取り付けられた後は、各部材はしっかりと固定
されており、高速で回転させても軸が振れることがない
ため、高速給紙を行うことができる。Effects of the Invention As described above, according to the present invention, the work for replacing the roller is extremely easy and can be performed in a short time. Further, at this time, since the roller shaft is not pulled out to the outside, a space is not required around the roller shaft, and the present paper feeding device can be used in a small copying machine or the like. Further, after once attached, each member is firmly fixed, and the shaft does not shake even when rotated at high speed, so that high-speed paper feeding can be performed.
第１図は本考案に係る給紙装置の給紙ローラと軸連結ス
リーブの近傍の断面図、第２図は実施例である複写機の
給紙部における給紙装置の動作を示す断面図、第３図は
複写機の給紙部の正面図、第４図（ａ）〜（ｄ）は給紙
ローラユニットを取り外す際の手順を示す図である。 10……カセットケース、12……装填部 14,15……複写用紙、16……バネ 18……給紙ローラユニット、18a,18b……ゴムローラ 20,21……左右側板、22……ローラ軸 23……従動軸、24,26……駆動軸 28,29……軸受、30,31……ストップリング 32……軸間スペース、34……連結スリーブ 35……ピン、36,37……ネジFIG. 1 is a sectional view of the vicinity of a sheet feeding roller and a shaft connecting sleeve of a sheet feeding apparatus according to the present invention, and FIG. 2 is a sectional view showing an operation of the sheet feeding apparatus in a sheet feeding section of a copying machine as an embodiment. FIG. 3 is a front view of the paper feed unit of the copying machine, and FIGS. 4A to 4D are views showing a procedure for removing the paper feed roller unit. 10 …… Cassette case, 12 …… Loading section 14,15 …… Copy paper, 16 …… Spring 18 …… Feeding roller unit, 18a, 18b …… Rubber rollers 20,21 …… Left and right side plates, 22 …… Roller shaft 23 …… Drive shaft, 24,26 …… Drive shaft 28,29 …… Bearing, 30,31 …… Stop ring 32 …… Space between shafts, 34 …… Coupling sleeve 35 …… Pin, 36,37 …… Screw
Claims (1)
が左右側板の間で自由端となっている第１軸部材と、 第１軸部材の外周に嵌装された筒状部材及び該筒状部材
に装着されたローラから成るローラユニットと、 第１軸部材と同軸上に設けられ、一端が第１軸部材の上
記他端から所定の間隔を隔てて自由端となっており、他
端が左側板に回転可能に支持されており、かつ、右側板
側へ上記所定間隔だけ引き抜くことにより左側板から取
り外し可能な第２軸部材と、 使用時には第１軸部材の自由端と第２軸部材の自由端と
の間に橋渡しされ、各軸部材毎に設けられた取り外し可
能な固定部材により両軸部材を連結するとともに、ロー
ラ交換時には第２軸部材の方へスライドすることにより
両軸部材を切り放すスリーブと、 を備え、第２軸部材を第１軸部材から切り放して左側板
から取り外すことによって生じるスペースを利用して前
記ローラユニットを第１軸部材から取り外せるようにし
たことを特徴とする給紙装置。1. A first shaft member, one end of which is rotatably supported by a right side plate, and the other end of which is a free end between left and right side plates, a tubular member fitted around the outer periphery of the first shaft member, and A roller unit formed of a roller mounted on the tubular member and provided coaxially with the first shaft member, one end of which is a free end with a predetermined distance from the other end of the first shaft member, The other end is rotatably supported by the left side plate, and is detachable from the left side plate by pulling out to the right side plate by the above-mentioned predetermined distance; and the free end and the first end of the first shaft member when used. The two shaft members are connected to each other by a removable fixing member provided for each shaft member and bridged between the free ends of the two shaft members, and both rollers are slid toward the second shaft member when the rollers are replaced. A sleeve for cutting off the shaft member; A sheet feeding device, wherein the roller unit can be detached from the first shaft member by utilizing a space generated by cutting the material off the first shaft member and removing it from the left side plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989150745U JPH0752114Y2 (en) | 1989-12-29 | 1989-12-29 | Paper feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989150745U JPH0752114Y2 (en) | 1989-12-29 | 1989-12-29 | Paper feeder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0391435U JPH0391435U (en) | 1991-09-18 |
| JPH0752114Y2 true JPH0752114Y2 (en) | 1995-11-29 |
Family
ID=31697080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989150745U Expired - Fee Related JPH0752114Y2 (en) | 1989-12-29 | 1989-12-29 | Paper feeder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0752114Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5173933B2 (en) * | 2009-05-22 | 2013-04-03 | 日立オムロンターミナルソリューションズ株式会社 | Card processing device |
| JP6452280B2 (en) * | 2013-09-27 | 2019-01-16 | キヤノン株式会社 | Sheet conveying apparatus and image forming apparatus |
| JP6442841B2 (en) * | 2014-03-13 | 2018-12-26 | 富士ゼロックス株式会社 | Paper conveying member, paper conveying apparatus and image forming apparatus using the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0165248U (en) * | 1987-10-19 | 1989-04-26 | ||
| JPH0696413B2 (en) * | 1988-06-23 | 1994-11-30 | 三田工業株式会社 | Paper feed roller mechanism of image forming apparatus |
-
1989
- 1989-12-29 JP JP1989150745U patent/JPH0752114Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0391435U (en) | 1991-09-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |